Recloseable carton having narrow cover front face panel



Oct. 25, 1966 K. T. BUTTERY RECLOSEABLE CARTON HAVING NARROW COVER FRONTFACE PANEL Filed Sept. 9, 1965 5 Sheets-Sheet l a fiery aft y Oct. 25,1966 K. T. BUTTERY 3,281,057

RECLOSEABLE CARTON HAVING NARROW COVER FRONT FACE PANEL Filed Sept. 9,1965 5 Sheets-Sheet 2 Oct. 25, 1966 K. r. BUTTERY RECLOSEABLE CARTONHAVING NARROW COVER FRONT PAGE PANEL 5 Sheets-Sheet 5 Filed Sept. 9,1965 Oct. 25, 1966 K. T. BUTTERY RECLOSEABLE CARTON HAVING NARROW COVERFRONT FACE PANEL Filed Sept. 9, 196

5 Sheets-Sheet 4 g%21 er2i0I Yfwmeifi 21514556127 Oct. 25, 1966 K. T.BUTTERY 3,281,057

RECLOSEABLE CARTON HAVING NARROW COVER FRONT FACE PANEL Filed Sept. 9,1965 5 Sheets-Sheet 5 ennez]? 7151:5567

United States Patent 3,281,057 RECLOSEABLE CARTON HAVING NARROW COVERFRONT FACE PANEL Kenneth T. Buttery, Kalamazoo, Mich., assignor, bymesne assignments, to Brown Company, a corporation of Delaware FiledSept. 9, 1965, Ser. No. 485,989

6 Claims. '(Cl. 229-51) The present invention relates to cartons, and ismore particularly concerned with cartons which may be readily andinexpensively erected from integral cut and scored blanks, particularlymutually nestable blanks, and which cartons may be readily andpositively sealed by means of automatic machinery, especially suchcartons as are recloseable and have a narrow cover front face panel.

Cartons having a so-called flip-top cover hingedly connected to the edgeof the rear panel, which may be erected with the cover in sealedcondition and which may be readily opened by the removal of a tearstrip, have become exceedingly popular as containers for food items suchas ice cream. Once the tear strip is removed, the cover may be openedfor access to some or all of the contents, and may be reclosed forfurther storage until the contents have been completely consumed.Cartons of the type described which have been available in the priorart, although satisfactory in use, have the disadvantage that they aredifiicult to construct and seal on automatic machinery.

Prior art cartons are generally provided with an outer front wall memberintegral with the cover of the carton, having its own flaps extending atthe ends thereof. A tear strip is provided as an integral unit andextends from the end of one outer front wall flap, across the outerfront wall, and .to the end of the opposite outer front wall flap. Sucha structure is expensive, difiicult to construct into a carton from anintegral blank, and requires expensive machinery for the purposes oferection and sealing. Additionally, the structure requires a largeamount of paperboard, thus adding to the cost of the materials employed.Moreover, for many purposes it is sufficient for only the cover frontwall to be provided with detachable means adhesively laffixing the coverto the front wall of the carton. Moreover, even where it is necessary toprovide some means for afiixing the cover end walls to the end walls ofthe body of the carton, it is in many cases sufl'icient to provide meansof limited extent for so doing. A further economy may be accomplished byshortening the cover front wall so that the blank from which the cartonis formed is substantially shorter and is more completely mutuallynestable with adjacent carton blanks cut from the paperboard sheet.However, problems arise with cartons having such shortened cover frontwalls in that, once the tear strip has been removed, upon reclosuredifliculty is experienced in retaining the cover in closed position. 7

It is an object of the present invention to provide a carton which maybe formed from integral cut and scored mutually nestable blanks. It is afurther object to provide a top-opening carton which may be sealed bymeans of a detachable adhesive strip afiixing the cover to the frontwall of the carton. It is another object to provide such a carton whichmay be readily reclosed when it is desired to store unconsumed contents.It is a still further object to provide a carton of the type describedwhich can be readily erected and subsequently sealed by means ofrelatively simple and inexpensive machinery. It is an additional objectto provide a carton having its panels so contoured as to facilitateassembling and heat sealing the various panels to form a strongly sealedcarton. It is a primary object of the invention to provide a carton ofthe type described having a cover front wall See panel which is. shorterthan the cover end wall panels but, nevertheless, one wherein the coverhas the capacity to remain closed after the carton has been opened andthe cover reclosed. It is a foremost object of this invention to providea carton of the type described having a shortened cover front wall panelwhich permits economy in the amount of paperboard or other material ofconstruction employed, but which nevertheless permits inclusion of atear strip as a detachable part of the entire cover front wall flap ormember, and which moreover includes means which permit and insure theeffective reclosure of the cover once the carton has been opened bydetaching the tear strip which originally adheres the cover assembly tothe container body assembly. It is an additional object of the inventionto provide a carton of the type described having means provided which iseffective in frictionally restraining the cover in closed position afterthe tear strip or other securing means has been removed, and which sorestrains the cover in closed position even when the carton is moved orjostled about under normal household use. The accomplishment of theforegoing and additional objects will become more fully apparenthereinafter. I

The invention in its preferred embodiment is illustrated by theaccompanying drawings in which:

FIG. 1 is a plan view of a blank cut and scored for assembling a cartonaccording to the invention, and additionally showing a portion of theedge of an adjacent blank nesting therewith.

I FIG. 2 is a plan view of the blank folded over and glued to form aflattened tube.

FIG. 3 is an end view of the carton showing the front and rear wallouter end flaps in partially folded position.

FIG. 4 is a bottom view of the structure of FIG. 3.

FIG. 5 is a cross-sectional view taken at the line 5-5 of FIG. 4.

FIG. 6 is a perspective view of the sealed carton.

FIG. 7 is a perspective view of the carton of FIG. 6 after the seal hasbeen broken and the cover opened.

FIG. 8 is a plan view of a blank cut and scored for assembling analternative embodiment of the invention, also showing a portion of theedge of another blank nested therewith.

FIG. 9 is a perspective view of the sealed carton prepared from theblank of FIG. 8; and

FIG. 10 is a perspective view of the carton of FIG. 9 after the seal hasbeen broken and the cover opened.

According to the invention, a carton is provided which is so that itaccomplishes the objects and provides the advantages stated anddescribed above, and which more specifically is formed from an integralblank having panels including a bottom member having inner end wallflaps hingedly connected to the ends thereof, a front wall memberhingedly connected to one edge of the bottom member having front wallouter end flaps hingedly connected to the ends thereof, and a rear wallmember hingedly connected to the other edge of the bottom member havingrear wall outer end flaps hingedly connected tothe ends thereof. A coveris provided which is hingedly connected to the upper edge of the rearwall member. The cover is provided with cover flaps comprising cover endwall panels and a cover front wall panel. The cover front wall panel isdesigned so that its length is smaller than the length of the cover endwall panels, the term length being used in reference to the distancebetween the score line defining the panel and the edge of the panelparallel thereto. The cover front wall panel is provided at its endswith end flaps overlapped by and adhesively affixed to the cover endwall panels. Each end flap of the cover front wall panel is so contouredthat a portion thereof extends downwardly in the erected carton (andlongitudinally with respect to the direction of the carton blank) adistance beyond the severance line defining the edge of the cover frontWall panel. Additionally, triangular webs connected to the ends .ofthecover front wallpanel and integral with the saidend flap extensions,extend below the edge of the cover front wall panel in the erectedcartonand cooperate with the end flaps to provide a structurefrictionally engaging the body of the carton and thereby retaining thecover in closed position after it has once been opened and thenreclosed.

" In a preferred embodiment, the cover end wall panels are each providedwith a detachable adhesive panelconnected thereto at a severance line.The structure of the carton is so designed that adjacent blanks may bereversed 'for nesting together during the cutting process in. order toconserve paperboard raw material. Several features are provided whichfacilitate such nesting. .The rear wall outer end flaps, the cover endwall flaps, and the cover front wall end flaps are designed to beshorter than the front wall outer endflapand the inner end wall flaps.The upper terminal corner of each rear wall outer end flap may beprovided with a recess, preferably rectangular, so designed that whenadjacent blanks are nested together in opposite directions with theoblique recessions of the rear wall outer end flaps in edge-to-edgeengagement, the edges of the rear upper corner of the .inner end wallflap ofoneblank are nested in edge-to-edge engagement the edges of thecorner recess of the ,7

rear wall outer end flap of the other blank. As a result of thesestructur-aldesigns, blanks may be cut from the stock paperboard inreversed nesting arrangement, resulting in a substantial saving in rawmaterial cost. Further, ,the oblique recesses at the lower terminalcorners of the rear wall outer end flaps provide an. additionaladvantage, in that they permit the forward edge of these flaps whereinareas having an adhesive applied thereto are indicated by stippledshading. In a preferred form, the carton of the invention is constructedfrom an integral blank, as illustrated in FIG. 1, and comprises a bottompanel member 1, a front wall member 2, and a rear wall- 'member 3hingedly connected to the bottom member 1. Acover 4 is hingedlyconnected to the rear wall member 3. The bottom 1 is provided at itsends with inner end wall flaps 5 hingedly connected thereto, the frontwall member-2 is provided at its ends with front wall outer end flaps 6hingedly connected thereto, and the rear wall member 3 is provided withrear wall outer end flaps 7 hingedly connected thereto.

The cover 4 is provided with end flaps 8 comprising cover end wallpanels 9 having panels 10 connected to 'the panels 9 at severance orfracture lines 11, and adhe- 'sively aflixed to both the front wallouter end flap 6 and rear wall outer end flap 7. The cover 4 is alsoprovided at its forward edge with a cover flap 12 comprising a coverfront Wall panel 13, and severance or fracture lines 14 defining adetachable tear strip 15 having a tab or graspableportionlfi at least atone end. thereof An adhesive panel 1 7 is adhesively affixed to thefront wall member. As can be seen in the drawings, the cover front wallpanel 13 is made shorter than the cover end Wall panels 9 in order toeffecta saving in paperboard dinally beyond the said severance line. Theinner corner of the overhang 18a is provided with an obliquely recessededge 18b. The oblique edge 18b is preferably colinear with a cut 21extending from the said severance line 14 at the edge of the cover.front wall panel defining a beveled edge of the tab 16 of the tearstrip 15 on one side and defining a triangular web 22 on the other sidethereof, said web being connected to and extending longitudinally beyondthe edge of the cover front wall panel. The overhang 18a constitutes anextension of the triangular web 22. As a result of this structure, amaterial saving is accomplished by the shortening of the cover frontwall member. Moreover, in order to avoid difliculty in maintaining thecover having the shortened front panel in closed position, thetriangular webs 22 and the depending portions of the cover front wallend flaps 18 cooperate to. provide frictional engagement of the coveragainst the front Wall and side walls forming the corners of the carton,thus retaining the cover in closed position afterthe panel 13 has beendetached at the severance line 14. j

The lower portions of the terminal edges of the rear wall'outer endflaps are each preferably provided with an oblique recession 19 recedingfrom the forward-most terminal edge 23 toward the bottom edge of theflap 7 to a vertical edge 23a having the same length as the edge 23.

The forward edge 23 should be positioned a sufficient distance from thebottom edge of the flap, or from an imaginary line representing anextension of the score line 25, so that the edge 23 clears the adhesivearea '24 when the flaps 6 and 7 are folded together. A corner recess 20is also provided in the upper terminal corner of the rear outer end wallflap 7 to facilitate nesting (if adjacent blanks when they are cut fromthe paperboard stock, as shown in FIG. 1. The oblique receding edge 19,which should preferably be straight, has a further function in that itpermits the oblique edge 19 of an adjacent blank to nest closelytherewith, as shown in FIG. 1, accomplishing a material saving in rawmaterial.

In the broader aspects of the invention, the recess or cut-out20 may beomitted, thus increasing the vertical dimension of the forward edge 23of flap 7 or of the oblique recession 19. Although such embodiment does.

front wall outer end flap 6, and that it permits the flap 6 to bedirectly adhered to the inner end wall 5 over a significant segment ofits length.

In assembling the carton, the carton blank may be folded at the scoreline between the bottom 1 and rear wall member 3. The cover front wallpanel 13 is then folded over and the adhesive panel 17 alfixed to theouter surface of the, front wall member 2, forming a folded tube, asshown in \FIG. 2. Alternatively, the front wall member '2' may be foldedover at thescore line connecting it with the bottom 1, and the adhesivepanel 17 may then be glued to the outer surface of the front wall member2 in the same manner. In either form the carton so foldedoccupies veryvlittle space, and may be shipped to the packager in this form forfilling and sealing. 7

To erect the carton further for filling, the folded carton is, squaredup, as on a conventional squaring machine. One end is then closed byfirst folding in the inner end wall flap 5. The rear wall outer end flap7 and the front wall outer end. flap 6 are then folded in, the frontwall"outer end flap overlapping the rear wall outer end flap.

The contour provided by the recessed edge 19 permits the terminal edge23 of the rear wall outer end, fiap 7 to clear the adhesive area 24 onthe inner surface. of the outer wall'end flap 6. The cover frontwallfpanel end flap 18 is then folded over, followed finally by thefolding over of the cover end Wall panel 9. The greater length of theflap 18 permits it to be engaged and folded over by the plow of thefolding apparatus before the panel 9 (of lesser width) is engaged. Heatis then applied to activate and set the adhesive, causing the front wallouter end flap 6 to become adhesively afiixed to the rear wall outer endflap 7 and also to the inner end flap 5. The adhesive panel becomesadhesively affixed to the rear wall outer end flap 7 and cover frontwall panel end flap 18 becomes affixed to cover end wall panel 9. Thecart-on may then be filled through the end remaining open. The openedend may subsequently be closed and sealed in the same manner, to form acompletely sealed carton as shown in FIG. 6. Alternatively, the firstcarton end may be closed and/or tacked, as with glue, but not sealed,and then both carton ends sealed concurrently or simultaneously afterfilling of the carton.

The carton may be opened by grasping the tab 16 and removing the tearstrip 15. As the cover is subsequently lifted open, the cover end wallpanels 9 are parted from the adhesive panels 10 at the severance lines11, forming the structure shown in FIG. 7. The cover may be reclosed forstoring any unconsumed contents. When so closed, the triangular webs 22engage the front wall member 3, and the flaps 18, including theoverhangs or extensions 18a, engage the front wall outer end flaps 6,retaining the cover in place.

A modified embodiment of the invention is shown in FIGS. 8-10. In thisembodiment the basic structure is the same as that shown in FIGS. 1-7.However, here the adhesive panel 17 is directly connected to the coverfront wall panel 13 at a severance line 14. Moreover, instead of beingadhesively affixed to the front wall member 2 throughout its entirearea, the adhesive strip 17 is afiixed to the front wall member only atisolated adhesive areas 30 as, for example, in the form of circles,ovals, tear drops, or rectangles, provided either on the surface of theadhesive panel as shown in FIG. 8, or on the corresponding areas of thefront wall member 2. If desired, a glue resist coating or glue resistink, or both may be advantageously applied intermediate the adhesiveareas to prevent adhesion at such places when a general application ofthe adhesive is provided. Intermediate the adhesive areas 30 transversecuts 31 are provided in the adhesive panel 17 for facilitating theremoval of the adhesive panel. Cut scores 32 are also provided on thefront surface of the front wall member surrounding the areas to whichthe adhesive areas 30 are to become aflixed.

In the preferred version of the embodiment shown in FIGS. 8-10., theentire area of the front wall member (excluding glue areas) to which theadhesive panel or strip is to be sealed is coated with a solid coatingof a glue-repellent ink, preferably one having microcrystalprintingformed by means of a dot pattern. The entire outer surface of thecart-on is pattern-coated with a release agent such as a wax coating,excluding the circular, oval, tear-drop, or other areas defined by thecut scores 32, which areas are to be glued to the adhesive strip. Theinner surface of the entire carton is also coated with a release coatingsuch as wax, excluding the areas on the adhesive strip whichsubsequently are to be placed in register with the glue areas of thefront wall member defined by the cut scores 32. A conventional gluecomposition is then appled as a solid coating over the inner surface ofthe adhesive strip 17. Consequently, when the adhesive panel or strip 17is folded over onto the front wall member 2, it becomes adhered to thefront wall member only at the tear-drop areas defined by the cut scorelines 32, which areas are substantially free of any release agent suchas wax. In the preferred embodiment, the transverse cuts 31 arepostioned immediately forward of each adhesive area 30 with respect tothe direction of tear. Consequently, when the adhesive panel 17 isgrasped at the tab. 16 and removed, it parts cleanly from the front 6wall member, except in the adhesive zones surrounded by the cut scorelines 32, within which zones only the top liner is removed in thetearing process.

Although either the wax coating or the glue repellent ink may be usedseparately as a release agent to prevent adhesion between the adhesivepanel 17 and the front wall member 2, optimum results are obtained bythe use of the combination of both. Moreover, although rectangular areasmay be provided free from the release agent at the adhesive zones,optimum results are obtained when the printed application of the releasecoating is closely patterned around the oval or tear drop areas,substantially exactly in register with the areas of the oval or teardrop. The conventional adhesive, such as glue, is laid down as a solidstrip on the front wall member from one end of the adhesive strip to theother. Other types of adhesive may be used if desired. Although in theprefered embodiment the adhesive is placed on the panel 17, it may ifdesired be applied to the front wall member 2. The transverse cuts 31serve to prevent splitting of the the stock as the adhesive strip zipperis pulled off. However, they may be dispensed with in certainapplications.

Although preferred forms of adhesive panels or strips have beendescribed and illustrated in the drawings, other forms, generally moresimplified, may also be utilized. For example the entire panel or strip17 may be adhered to the front wall member 2. The cover may then beseparated from the adhesive panel by tearing the severance line by meansof a knife, or merely by running a fingernail along the severance linewhile pressing inwardly. Other forms of adhesive panels known to the arthaving a structure wherein they are separated from the cover front wallpanel by at least one severance line may also be used.

The carton of FIGS. 8-10 is assembled and sealed in substantially thesame manner as described above. The sealed carton may be opened bygrasping the tab 16 and completely removing the panel 17. As the coveris lifted open, the adhesive panels 10 are detached and permit the coverto be fully opened.

The carton of the invention has an important advantage over prior artcartons in that successive blanks may be positioned and cut in closelynested position, effecting a substantial saving in material costs. Afurther saving in material cost results from the fact that the coverfront wall panel is materially shortened, permitting more perfectnesting. The difiiculties which might otherwise be inherent in ashortened cover front wall panel are overcome by the novel structurehaving a dependent triangular web extending beyond the edge of the panelcooperating with a cover front panel end flap having a depending portionextending beyond the edge of the cover front wall panel, whichstructures frictionally engages the front wall and end of the carton andretain the cover in closed position even after it has been unsealed andreclosed.

The terminal edges of the rear wall outer end flaps are so contouredthat they do not interfere with the adhesive contained upon the innersurface of the front wall outer end flaps, facilitating the assembly ofthe carton. Further, the increased length of the cover front wall panelflaps with respect to the width of the cover end wall panels facilitatestheir being properly folded under the cover end wall panels usinginexpensive machinery or adaptations thereof.

It is thus seen that an economical and conveniently erected and sealedcarton of sufiicient durability for frequent opening and reclosing isproduced, from an integral blank so designed that adjacent blanks may beoriented for close mutual nesting to provide an appreciable saving incost of raw material, and whereby all of the other objectives of theinvention are attained.

Although the invention has been described primarily as it would bepracticed when a heat-scalable adhesive is carried directly on thecarton blank, other types and hesive to effect sealing of the carton maybe employed. Plastic (such as polyethylene) coated or wax coatedpaperboard, or laminated paperboard with openings for extrusion sealing,may also be employed for the cartons and carton blanks according to theinvention. 7

The outer end flap tapers 50, 51, and 52, where shown in the drawings,are not essential for either operativeness However, it

or completeness of the carton structure. has been found that taper 50 atthe upper terminal edge of the rear wall outer end flap and taper 52 atthe upper terminal edge of the front wall outer end flap are convenientmodifications which have the result of eliminating upper terminal edgeof the front wall outer end flap 6 during closing of the front wallouter end flap 6 uponthe rear wall outer end flap 7. This tendency tobind 'is eliminated by provision of taper 51 at the upper terminal edgeof front wall outer end flaps 6, which may be present alone or togetherwith taper 52, in such latter case providing a double taper to the upperterminal edge of the front wall outer end flap 6 in the preferredembodiment of this structural modification. In addition, the tapers 50and 52 serve the further function of maintaining the outer end flaps 6and 7 in better alignment upon sealing, since closure of the cover endflapsupon the front and rear wall outer end flaps 6 and 7 when tapers 50and 52 are present does not tend to push the end flaps out of properalignment thereby causing the ultimate sealing to be less satisfactorythan desired.

It is to be understood that the invention is not limited to the exactdetails of construction, operation, or exact materials or embodiments.shown and described, as abvious modifications and equivalents will beapparent to one skilled in the art, and the invention is therefore to belimited only by the scope of the appended claims.

I claim:

1. A carton formed of an integral blank cut and scored to provide abottom member having end wall flaps hingedly connected to the endsthereof, a front wall member hingedly connected to one edge of saidbottom member having front wall end flaps hingedly connected to the endsthereof, and a rear wall member hingedly connected to the other edge ofsaid bottom having rear wall end flaps hingedly connected to the endsthereof, a cover hingedly connected to'the upper edge of said rear wallmember provided with cover flaps comprising cover end wall panels and acover front wall panel having flaps at its ends overlapped by andadhesively affixed tosaid cover end wall panels, and detachable meansadhesively aflixing said cover front wall panel to said front wallmember, said cover front wall panel being shorter than said cover endwall panels and having a web at each end extending below the edge ofsaid cover front wall panel, and said cover front wall panel end flapseach having a portion thereof extending below the edge of said coverfront wall panel, said extending portions being hingedly connected tosaid webs, whereby said cover front wall panel end flaps and said webscooperate to provide frictional engagement with the corners of saidcarton retaining said coverin closed position after said meansadhesivelyaffixing said cover front wall panel to said front wall memberhas been detached.

2. A carton formed of an integral blank cut and scored to provide abottom member having inner end wall flaps hingedly connected to the endsthereof, a front wall member hingedly connected to one edge of saidbottom member having front wall outer end flaps hingedly connected tothe ends thereof, and a rear wall member forms of adhesive and othermeans of applying the ad- 8 hingedly connected to the other edge" ofsaid bottom having rear wall outer end flaps hingedly connected to theends thereof, a cover hingedly connected to the upper edge of said rearWall member provided With cover flaps comprising cover end wall panelsand a cover front Wall panel having flaps at its ends overlapped by andadhe- -sively affixed to said cover end wall panels, and detachablemeans adhesively afi-ixing said cover front Wall panel to said frontwall member, said cover front wall panel being shorter than said coverend wall panels and having a generally triangular web with an obliquefree edge, each end extending below the edge of said cover front wallpanel, and said cover front wall panel end flaps each having a portionthereof extending below the edge of said cover front wall panel, saidextending portions being hingedly connected to said Webs and each havingan obliquely receding forward edge generally colinear with the obliqueedge of one of said webs in the unerected blank, whereby said coverfront wall panel end flaps and said webs cooperate to provide frictionalengagement with the corners of said carton thereby'retaining said coverin closed position after said means adhesively aflixing said cover frontwall panel to said front wall member has been detached.

3. An integral blank for forming a carton cut and scored to provide abottom member having end wall flaps hingedly connected to the endsthereof, a front wall member hingedly connected to one edge of saidbottom member having front wall end flaps hingedly connected to the endsthereof, and a rear wall member hingedly connected to the other edge ofsaid bottom having rear wall end flaps hingedly connected to the endsthereof, a cover hingedly connected to the upper edge of said rear wallmember provided with cover flaps comprising cover end wall panels, and acover front wall panel having flaps at its ends adapted to be overlappedby and adhesively affixed to said cover end wall panels, and detachablemeans adapted for adhesively afiixing said cover front wall panel tosaid front wall member, said cover front wall panel being shorterthansaid cover end wall panels and having a web at each end extendingbelow the edge said cover in closed position after said means adhesivelyaflixing said cover front wall panel to said front wall member has beendetached.

4. An integral blank for forming a carton cut and scored to provide abottom member having inner end wall flaps hingedly connected to the endsthereof, a front wall memaffixed to said cover end wall panels, anddetachable means adapted for adhesively afiixing said cover front 'wallpanel to said front wall member, said cover front wall panel beingshorter than said cover end wall panels and having a generallytriangular web with an oblique free edge at each end extending below theedge of said cover front wall panel, and said cover' front wall panelend flaps each having a portion thereof extending below the edge of saidcover front wall panel, said extending portions being hingedly connectedto said webs and each having an obliquely receding forward edgegenerally colinear with the oblique edge of one of said webs,

whereby said cover front wall panel end flaps and said webs cooperate toprovide frictional engagement with the corners of a carton erected fromsaid blank for retaining said cover in closed position after said meansadhesively affixing said cover front Wall panel to said front wallmember has been detached.

5. An integral blank for forming a carton cut and scored to provide abottom member having inner end wall flaps hingedly connected to the endsthereof, a front wall member hingedly connected to one edge of saidbottom member having front wall outer end flaps hingedly connected tothe ends thereof, and a rear wall member hingedly connected to the otheredge of said bottom having rear wall outer end flaps hingedly connectedto the ends thereof, a cover hingedly connected to the upper side ofsaid rear wall member provided with cover flaps comprising cover endwall panels and a cover front wall panel having flaps at its endsadapted to be overlapped by and adhesively affixed to said cover endwall panels, and detachable means adapted for adhesively aflixing saidcover front Wall panel to said fnont wall member comprising a stripadapted to be adhesively affixed to said front wall member detachablyconnected to the edge of said cover front wall member by means of a tearstrip defined by a pair of spacedapart severance lines, said cover frontwall panel being shorter than said cover end wall panels and having agenerally triangular web with an oblique free edge at each end extendingbelow the edge of said cover front wall panel, and said cover front wallpane-l end flaps each having a portion thereof extending below the edgeof said cover front wall panel, said extending portions being hingedlyconnected to said Webs and each having an obliquely receding forwardedge substantially colinear with the oblique edge of one of said webs,said strip being provided at each end with a beveled corner contiguouswith the oblique edges of said Webs, whereby said cover front wall panelend flaps and said webs cooperate to provide frictional engagement withthe corners of a carton erected from said blank for retaining said coverin closed position after said means adhesively affixing said cover frontWall panel to said front wall member has been detached.

6. An integral blank for forming a carton cut and scored to provide abottom member having inner end wall flaps hingedly connected to the endsthereof, a front wall member hingedly connected to one edge of saidbottom member having front wall outer end flaps hingedly connected tothe ends thereof, and a rear wall member hingedly connected to the otheredge of said bottom having rear wall outer end flaps hingedly connectedto the ends thereof, a cover hingedly connected to the upper edge ofsaid rear wall member provided with cover flaps comprising cover endwall panels and a cover front wall panel having flaps at its endsadapted to be overlapped by and adhesively affixed to said cover endwall panels, and detachable means adapted for adhesively affixing saidcover front wall panel to said front wall member comprising a stripadhesively affixed to said front wall member and detachably connected tothe edge of said cover front wall member, whereby when said carton iserected, said cover front wall panel may be released by tearing off saidstrip, said cover front wall panel being shorter than said cover endwall panels and having a generally triangular web with an oblique freeedge at each end extending below the edge of said cover front wallpanel, and said cover front wall panel end flaps each having a portionthereof extending below the edge of said cover front wall panel, saidextending portions being hingedly connected to said webs and each havingan obliquely receding forward edge substantially colinear with theoblique edge of one of said webs, said stri p being provided at each endwith a beveled corner contiguous with the oblique edge of one of saidwebs, whereby said cover front wall panel end flaps and said webscooperate to provide frictional engagement with the corners of a cartonerected from said blank for retaining said cover in closed positionafter said means adhesively affixing said cover front wall panel to saidfront wall member has been detached.

References Cited by the Examiner UNITED STATES PATENTS Re. 25,87610/1965 Buttery et al.

1,963,639 6/ 1934 Ahlquist 229- 2,330,666 9/ 1943 Berkowitz 229-3,125,280 3/1964 Henry 229-51 3,144,980 8/1964 Larson 22951 3,146,9369/1964 Hodapp 229-51 3,197,114 7/ 1965 Holmes 229-5 1 JOSEPH R. LECLAIR,Primary Examiner.

DAVID M. BOCKENEK, Examiner.

1. A CARTON FORMED OF AN INTEGRAL BLANK CUT AND SCORED TO PROVIDE ABOTTOM MEMBER HAVING END WALL FLAPS HINGEDLY CONNECTED TO THE ENDSTHEREOF, A FRONT WALL MEMBER HINGEDLY CONNECTED TO ONE EDGE OF SAIDBOTTOM MEMBER HAVING FRONT WALL END FLAPS HINGEDLY CONNECTED TO THE ENDSTHEREOF, AND A REAR WALL MEMBER HINGEDLY CONNECTED TO THE OTHER EDGE OFSAID BOTTOM HAVING REAR WALL END FLAPS HINGEDLY CONNECTED TO THE ENDSTHEREOF, A COVER HINGEDLY CONNECTED TO THE UPPER EDGE OF SAID REAR WALLMEMBER PROVIDED WITH COVER FLAPS COMPRISING COVER END WALL PANELS AND ACOVER FRONT WALL PANEL HAVING FLAPS AT ITS ENDS OVERLAPPED BY ANDADHESIVELY AFFIXED TO SAID COVER END WALL PANELS, AND DETACHABLE MEANSADHESIVELY AFFIXING SAID COVER FRONT WALL PANELS TO SAID FRONT WALL